Селектор функций и проверка входных параметров (шаблон)

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# If quantity of params not equals 2, then exit
if [ $# != 2 ]; then
        cont_use
else
        case $1 in
                start)
                action='lxc-start'
                cont_act
                ;;
                stop)
                action='lxc-stop'
                cont_act
                ;;
                list)
                action='lxc-ls'
                $action -f
                ;;
                kill)
                action='lxc-destroy'
                cont_kill
                ;;
                test)
                dry-run
                ;;
                *)
                cont_use
                ;;
        esac
fi